"I wasn't scared because the cage makes you feel invincible," she told Us Weekly at the Nature Conservancy "Style and Beauty for the Planet" event in NYC Monday. "I've never been attacked by a shark, so I have a hard time conceptualizing the fear of being attacked."

Noting that South Africa was a "beautiful" and "wonderful" country, Bell added that "cage diving was really the most exceptional thing, because not a lot of people get to be six inches from a great white shark!"

During her trip, the House of Lies actress also spent time educating herself about the importance of water conservation.

"I was always very willing to accept clean water as being a global issue and something that Africa struggles with, but what I've learned through this partnership with Neutrogena Naturals -- where I'm a brand ambassador -- is how much of a domestic issue it is."

"I got to visit the Colorado River earlier this year and what I've learned was profound," Bell continued. "You can actually see the line where the river started. It used to be this big gushing thing and now it's been depleted."

"There are tiny choices that everyone can make that profoundly affect our collective water use," Bell explained. "Like not having the tap on while brushing your teeth, not starting your shower ten minutes in advance, not doing laundry until you have a full load. In this particular issue, education really is power."